BFS-fs: bfs_fill_super(): No BFS filesystem on loop5 (magic=26574c49) ====================================================== WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.5/8864 is trying to acquire lock: 000000003babb1bd (&sig->cred_guard_mutex){+.+.}, at: do_io_accounting fs/proc/base.c:2750 [inline] 000000003babb1bd (&sig->cred_guard_mutex){+.+.}, at: proc_tgid_io_accounting+0x1cf/0x7f0 fs/proc/base.c:2799 but task is already holding lock: 000000001e5192fe (&p->lock){+.+.}, at: seq_read+0x6b/0x11c0 fs/seq_file.c:164 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&p->lock){+.+.}: seq_read+0x6b/0x11c0 fs/seq_file.c:164 proc_reg_read+0x1bd/0x2d0 fs/proc/inode.c:231 do_loop_readv_writev fs/read_write.c:701 [inline] do_loop_readv_writev fs/read_write.c:688 [inline] do_iter_read+0x471/0x630 fs/read_write.c:925 vfs_readv+0xe5/0x150 fs/read_write.c:987 kernel_readv fs/splice.c:362 [inline] default_file_splice_read+0x457/0xa00 fs/splice.c:417 do_splice_to+0x10e/0x160 fs/splice.c:881 splice_direct_to_actor+0x2b9/0x8d0 fs/splice.c:959 do_splice_direct+0x1a7/0x270 fs/splice.c:1068 do_sendfile+0x550/0xc30 fs/read_write.c:1447 __do_sys_sendfile64 fs/read_write.c:1508 [inline] __se_sys_sendfile64+0x147/0x160 fs/read_write.c:1494 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #2 (sb_writers#3){.+.+}: sb_start_write include/linux/fs.h:1579 [inline] mnt_want_write+0x3a/0xb0 fs/namespace.c:360 ovl_create_object+0x96/0x290 fs/overlayfs/dir.c:602 lookup_open+0x893/0x1a20 fs/namei.c:3235 do_last fs/namei.c:3327 [inline] path_openat+0x1094/0x2df0 fs/namei.c:3537 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 do_sys_open+0x3b3/0x520 fs/open.c:1085 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #1 (&ovl_i_mutex_dir_key[depth]){++++}: inode_lock_shared include/linux/fs.h:758 [inline] do_last fs/namei.c:3326 [inline] path_openat+0x17ec/0x2df0 fs/namei.c:3537 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 do_open_execat+0x11d/0x5b0 fs/exec.c:853 __do_execve_file+0x1a8b/0x2360 fs/exec.c:1770 do_execveat_common fs/exec.c:1879 [inline] do_execve+0x35/0x50 fs/exec.c:1896 __do_sys_execve fs/exec.c:1977 [inline] __se_sys_execve fs/exec.c:1972 [inline] __x64_sys_execve+0x7c/0xa0 fs/exec.c:1972 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #0 (&sig->cred_guard_mutex){+.+.}: __mutex_lock_common kernel/locking/mutex.c:937 [inline] __mutex_lock+0xd7/0x1190 kernel/locking/mutex.c:1078 do_io_accounting fs/proc/base.c:2750 [inline] proc_tgid_io_accounting+0x1cf/0x7f0 fs/proc/base.c:2799 proc_single_show+0xeb/0x170 fs/proc/base.c:755 seq_read+0x4e0/0x11c0 fs/seq_file.c:232 __vfs_read+0xf7/0x750 fs/read_write.c:416 vfs_read+0x194/0x3c0 fs/read_write.c:452 ksys_read+0x12b/0x2a0 fs/read_write.c:579 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe other info that might help us debug this: Chain exists of: &sig->cred_guard_mutex --> sb_writers#3 --> &p->lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&p->lock); lock(sb_writers#3); lock(&p->lock); lock(&sig->cred_guard_mutex); *** DEADLOCK *** 2 locks held by syz-executor.5/8864: #0: 0000000026b87859 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 #1: 000000001e5192fe (&p->lock){+.+.}, at: seq_read+0x6b/0x11c0 fs/seq_file.c:164 stack backtrace: CPU: 0 PID: 8864 Comm: syz-executor.5 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 print_circular_bug.constprop.0.cold+0x2d7/0x41e kernel/locking/lockdep.c:1222 check_prev_add kernel/locking/lockdep.c:1866 [inline] check_prevs_add kernel/locking/lockdep.c:1979 [inline] validate_chain kernel/locking/lockdep.c:2420 [inline] __lock_acquire+0x30c9/0x3ff0 kernel/locking/lockdep.c:3416 lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3908 __mutex_lock_common kernel/locking/mutex.c:937 [inline] __mutex_lock+0xd7/0x1190 kernel/locking/mutex.c:1078 do_io_accounting fs/proc/base.c:2750 [inline] proc_tgid_io_accounting+0x1cf/0x7f0 fs/proc/base.c:2799 proc_single_show+0xeb/0x170 fs/proc/base.c:755 seq_read+0x4e0/0x11c0 fs/seq_file.c:232 __vfs_read+0xf7/0x750 fs/read_write.c:416 vfs_read+0x194/0x3c0 fs/read_write.c:452 ksys_read+0x12b/0x2a0 fs/read_write.c:579 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f95c7390109 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f95c5d05168 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007f95c74a2f60 RCX: 00007f95c7390109 RDX: 0000000000002020 RSI: 0000000020004a00 RDI: 0000000000000004 RBP: 00007f95c73ea05d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffa5680b1f R14: 00007f95c5d05300 R15: 0000000000022000 FAT-fs (loop5): Unrecognized mount option "ˆí{ôqå vž‚x5¯Ú_Ù”£JÛGòµêm-FîÝI„ÑÜB§c]DpàŠE2W ÁfÖÌ2êõe+Þ/“>Ø" or missing value EXT4-fs warning (device loop2): ext4_multi_mount_protect:386: Unable to create kmmpd thread for loop2. FAT-fs (loop5): Unrecognized mount option "appraise_type=imasig" or missing value BFS-fs: bfs_fill_super(): No BFS filesystem on loop5 (magic=26574c49) x_tables: duplicate underflow at hook 2 bond0: cannot enslave bond to itself. 8021q: adding VLAN 0 to HW filter on device macvlan2 x_tables: duplicate underflow at hook 2 Dev loop2: unable to read RDB block 10 loop2: unable to read partition table loop2: partition table beyond EOD, truncated loop_reread_partitions: partition scan of loop2 () failed (rc=-5) Dev loop2: unable to read RDB block 10 loop2: unable to read partition table loop2: partition table beyond EOD, truncated netlink: 'syz-executor.4': attribute type 10 has an invalid length. Dev loop2: unable to read RDB block 10 loop2: unable to read partition table loop2: partition table beyond EOD, truncated loop_reread_partitions: partition scan of loop2 () failed (rc=-5) Dev loop2: unable to read RDB block 10 loop2: unable to read partition table loop2: partition table beyond EOD, truncated Dev loop2: unable to read RDB block 10 loop2: unable to read partition table loop2: partition table beyond EOD, truncated loop_reread_partitions: partition scan of loop2 () failed (rc=-5) 8021q: adding VLAN 0 to HW filter on device team0 bond0: Enslaving team0 as an active interface with an up link bond0: cannot enslave bond to itself. bond0: cannot enslave bond to itself. netlink: 'syz-executor.4': attribute type 10 has an invalid length. 8021q: adding VLAN 0 to HW filter on device macvlan2 audit: type=1800 audit(1656935023.984:13015): pid=9328 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.4" name="bus" dev="sda1" ino=16030 res=0 nla_parse: 6 callbacks suppressed netlink: 8 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor.2'. audit: type=1804 audit(1656935024.514:13016): pid=9362 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir2847357300/syzkaller.bbBYbh/641/cgroup.controllers" dev="sda1" ino=16004 res=1 audit: type=1800 audit(1656935024.934:13017): pid=9431 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.4" name="bus" dev="sda1" ino=16004 res=0 IPVS: ftp: loaded support on port[0] = 21 audit: type=1804 audit(1656935025.104:13018): pid=9455 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir2847357300/syzkaller.bbBYbh/643/cgroup.controllers" dev="sda1" ino=13951 res=1 IPVS: ftp: loaded support on port[0] = 21 audit: type=1800 audit(1656935025.304:13019): pid=9545 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.4" name="bus" dev="sda1" ino=16050 res=0 IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 overlayfs: unrecognized mount option "lowerdir×9çŸó±”" or missing value overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. audit: type=1800 audit(1656935027.534:13020): pid=9883 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="bus" dev="sda1" ino=13921 res=0 overlayfs: unrecognized mount option "lowerdir×9çŸó±”" or missing value caif:caif_disconnect_client(): nothing to disconnect audit: type=1800 audit(1656935027.554:13021): pid=9883 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="bus" dev="sda1" ino=13921 res=0 overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. audit: type=1800 audit(1656935027.934:13022): pid=9930 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="bus" dev="sda1" ino=14226 res=0 overlayfs: unrecognized mount option "lowerdir×9çŸó±”" or missing value caif:caif_disconnect_client(): nothing to disconnect audit: type=1800 audit(1656935027.934:13023): pid=9930 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="bus" dev="sda1" ino=14226 res=0 wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. audit: type=1800 audit(1656935028.214:13024): pid=9990 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="bus" dev="sda1" ino=14178 res=0 EXT4-fs error (device loop2): ext4_ext_check_inode:498: inode #2: comm syz-executor.2: pblk 0 bad header/extent: invalid extent entries - magic f30a, entries 1, max 4(4), depth 0(0) overlayfs: unrecognized mount option "upperd" or missing value EXT4-fs (loop2): get root inode failed EXT4-fs (loop2): mount failed IPVS: ftp: loaded support on port[0] = 21 caif:caif_disconnect_client(): nothing to disconnect EXT4-fs error (device loop2): ext4_ext_check_inode:498: inode #2: comm syz-executor.2: pblk 0 bad header/extent: invalid extent entries - magic f30a, entries 1, max 4(4), depth 0(0) ieee80211 phy39: Selected rate control algorithm 'minstrel_ht' EXT4-fs (loop2): get root inode failed overlayfs: unrecognized mount option "upperd" or missing value EXT4-fs (loop2): mount failed ieee80211 phy40: Selected rate control algorithm 'minstrel_ht' ieee80211 phy41: Selected rate control algorithm 'minstrel_ht' overlayfs: unrecognized mount option " 5 rdirT./bus" or missing value